This paper briefly introduces the technological flow of the straightener in Laiwu Steel Group's heavy H-beam mill and emphatically describes the main control model of the straightener.

This paper shows the study on the structure parameter calculation of section straightener with parallel upper rolls and below rolls that has staggered arrangement.

The invention discloses a novel rail-straightening machine capable of effectively improving a straightening dead zone of a rail, and avoids waste caused by cutting off the straightening dead zone.